The Tank Museum has just published a Tank Chat video on how they researched the correct colors to paint their collection of Tigers plus a little history of how the RAL color system worked. It's on their YouTube channel.

Thanks Mark, very interesting.

Here is the direct link:

Thanks for adding the link Carlos. One of these days I'll figure out how to do that.

Very interesting video with a lot of useful information.
What's interesting is how it's explained that RAL paints were base oxides and would not fade any further than when applied, even in sunlight. Yet how many times do we see faded paint effects done on models?
Certainly something I won't be doing after seeing that.

Would be interesting to see a similar video on British and US colours and just how susceptible to fading they were in certain conditions.